/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
 *                                                                  *
 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002             *
 * by the XIPHOPHORUS Company http://www.xiph.org/                  *
 *                                                                  *
 ********************************************************************

 function: bitrate tracking and management
 last mod: $Id: bitrate.h,v 1.7 2002/07/11 06:40:48 xiphmont Exp $

 ********************************************************************/

#ifndef _V_BITRATE_H_
#define _V_BITRATE_H_

#include "../vorbis/codec.h"
#include "codec_internal.h"
#include "os.h"

/* encode side bitrate tracking */
typedef struct bitrate_manager_state
{
	ogg_uint32_t*  queue_binned;
	ogg_uint32_t*  queue_actual;
	int            queue_size;

	int            queue_head;
	int            queue_bins;

	long*          avg_binacc;
	int            avg_center;
	int            avg_tail;
	ogg_uint32_t   avg_centeracc;
	ogg_uint32_t   avg_sampleacc;
	ogg_uint32_t   avg_sampledesired;
	ogg_uint32_t   avg_centerdesired;

	long*          minmax_binstack;
	long*          minmax_posstack;
	long*          minmax_limitstack;
	long           minmax_stackptr;

	long           minmax_acctotal;
	int            minmax_tail;
	ogg_uint32_t   minmax_sampleacc;
	ogg_uint32_t   minmax_sampledesired;

	int            next_to_flush;
	int            last_to_flush;

	double         avgfloat;

	/* unfortunately, we need to hold queued packet data somewhere */
	oggpack_buffer* packetbuffers;
	ogg_packet*     packets;

} bitrate_manager_state;

typedef struct bitrate_manager_info
{
	/* detailed bitrate management setup */
	double queue_avg_time;
	double queue_avg_center;
	double queue_minmax_time;
	double queue_hardmin;
	double queue_hardmax;
	double queue_avgmin;
	double queue_avgmax;

	double avgfloat_downslew_max;
	double avgfloat_upslew_max;

} bitrate_manager_info;

extern void vorbis_bitrate_init( vorbis_info* vi, bitrate_manager_state* bs );
extern void vorbis_bitrate_clear( bitrate_manager_state* bs );
extern int vorbis_bitrate_managed( vorbis_block* vb );
extern int vorbis_bitrate_addblock( vorbis_block* vb );
extern int vorbis_bitrate_flushpacket( vorbis_dsp_state* vd, ogg_packet* op );

#endif
